The sky was lit but the sun was down. You could see the perfect outline of a triangle, no lights on, perhaps 50-75ft from the ground. I pointed it out to two other people, it resumed hoovering then shot off silently over the alley from North to south. Completely silent
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Off
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Boulder
USA
10 seconds
10 seconds
40.02
-105.26
triangle
CO
Occurred : 10/1/2016 19:00 (Entered as : 10/01/16 19:00) Reported: 10/4/2016 3:11:31 PM 15:11 Posted: 10/11/2016 Location: Boulder, CO Shape: Triangle Duration: 10 seconds
The sky was lit but the sun was down. You could see the perfect outline of a triangle, no lights on , perhaps 50-75ft from the ground.